988790450 has 18 divisors (see below), whose sum is σ = 1839563901. Its totient is φ = 395427240.

The previous prime is 988790449. The next prime is 988790459. The reversal of 988790450 is 54097889.

It can be written as a sum of positive squares in 2 ways, for example, as 969014641 + 19775809 = 31129^2 + 4447^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22235.

It is a super-2 number, since 2×988790450² = 1955413108022405000, which contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (988790459) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 220127 + ... + 224573.

Almost surely, 2^988790450 is an apocalyptic number.

988790450 is a deficient number, since it is larger than the sum of its proper divisors (850773451).

988790450 is an frugal number, since it uses more digits than its factorization.

988790450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8906 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 988790450 is about 31445.0385593658. The cubic root of 988790450 is about 996.2494341754.

Multiplying 988790450 by its sum of digits (50), we get a square (49439522500 = 222350²).

988790450 divided by its sum of digits (50) gives a square (19775809 = 4447²).

The spelling of 988790450 in words is "nine hundred eighty-eight million, seven hundred ninety thousand, four hundred fifty".