Base | Representation |
---|---|
bin | 111011000100010… |
… | …101000001000000 |
3 | 2120001201112021011 |
4 | 323010111001000 |
5 | 4012143143100 |
6 | 242200210304 |
7 | 33362164561 |
oct | 7304250100 |
9 | 2501645234 |
10 | 990990400 |
11 | 46942a834 |
12 | 237a69994 |
13 | 12a40436a |
14 | 95884168 |
15 | 5c001bba |
hex | 3b115040 |
990990400 has 63 divisors (see below), whose sum is σ = 2441558109. Its totient is φ = 395892480.
The previous prime is 990990383. The next prime is 990990431. The reversal of 990990400 is 4099099.
The square root of 990990400 is 31480.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in only one way, i.e., 356756544 + 634233856 = 18888^2 + 25184^2 .
It is a Harshad number since it is a multiple of its sum of digits (40).
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1258807 + ... + 1259593.
Almost surely, 2990990400 is an apocalyptic number.
990990400 is the 31480-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 990990400
990990400 is an abundant number, since it is smaller than the sum of its proper divisors (1450567709).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
990990400 is an frugal number, since it uses more digits than its factorization.
990990400 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1596 (or 794 counting only the distinct ones).
The product of its (nonzero) digits is 26244, while the sum is 40.
The cubic root of 990990400 is about 996.9877353726.
Multiplying 990990400 by its product of nonzero digits (26244), we get a square (26007552057600 = 50997602).
The spelling of 990990400 in words is "nine hundred ninety million, nine hundred ninety thousand, four hundred".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •