90698940 has 60 divisors (see below), whose sum is σ = 284531016. Its totient is φ = 24185952.

The previous prime is 90698917. The next prime is 90698947. The reversal of 90698940 is 4989609.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90698947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26374 + ... + 29613.

Almost surely, 2^90698940 is an apocalyptic number.

90698940 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

90698940 is an abundant number, since it is smaller than the sum of its proper divisors (193832076).

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

90698940 is a wasteful number, since it uses less digits than its factorization.

90698940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56008 (or 55997 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 90698940 is about 9523.5991095804. The cubic root of 90698940 is about 449.2975707776.

The spelling of 90698940 in words is "ninety million, six hundred ninety-eight thousand, nine hundred forty".