90403957440 has 140 divisors (see below), whose sum is σ = 321582873216. Its totient is φ = 24107715072.

The previous prime is 90403957349. The next prime is 90403957451. The reversal of 90403957440 is 4475930409.

It is a happy number.

90403957440 is a `hidden beast` number, since 9 + 0 + 4 + 0 + 39 + 574 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1717984 + ... + 1769823.

Almost surely, 2^90403957440 is an apocalyptic number.

90403957440 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90403957440 is an abundant number, since it is smaller than the sum of its proper divisors (231178915776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90403957440 is a wasteful number, since it uses less digits than its factorization.

90403957440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487836 (or 3487817 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 90403957440 in words is "ninety billion, four hundred three million, nine hundred fifty-seven thousand, four hundred forty".