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9990436 = 222497609
BaseRepresentation
bin100110000111…
…000100100100
3200210120022011
4212013010210
510024143221
6554044004
7150626431
oct46070444
920716264
109990436
115703a65
123419604
1320ba401
141480b88
15d251e1
hex987124

9990436 has 6 divisors (see below), whose sum is σ = 17483270. Its totient is φ = 4995216.

The previous prime is 9990403. The next prime is 9990457. The reversal of 9990436 is 6340999.

It can be written as a sum of positive squares in only one way, i.e., 9734400 + 256036 = 3120^2 + 506^2 .

It is a super-2 number, since 2×99904362 = 199617622940192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248801 + ... + 1248808.

Almost surely, 29990436 is an apocalyptic number.

9990436 is the 1690-th centered heptagonal number.

It is an amenable number.

9990436 is a deficient number, since it is larger than the sum of its proper divisors (7492834).

9990436 is a wasteful number, since it uses less digits than its factorization.

9990436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497613 (or 2497611 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 9990436 is about 3160.7650972510. The cubic root of 9990436 is about 215.3747637174.

The spelling of 9990436 in words is "nine million, nine hundred ninety thousand, four hundred thirty-six".

Divisors: 1 2 4 2497609 4995218 9990436