90697439040 has 448 divisors, whose sum is σ = 324989952000. Its totient is φ = 21276794880.

The previous prime is 90697438933. The next prime is 90697439051. The reversal of 90697439040 is 4093479609.

It is a super-2 number, since 2×90697439040² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25919211 + ... + 25922709.

It is an arithmetic number, because the mean of its divisors is an integer number (725424000).

Almost surely, 2^90697439040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90697439040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162494976000).

90697439040 is an abundant number, since it is smaller than the sum of its proper divisors (234292512960).

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

90697439040 is a wasteful number, since it uses less digits than its factorization.

90697439040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 51.

The spelling of 90697439040 in words is "ninety billion, six hundred ninety-seven million, four hundred thirty-nine thousand, forty".