90612840 has 32 divisors (see below), whose sum is σ = 271838880. Its totient is φ = 24163392.

The previous prime is 90612817. The next prime is 90612853. The reversal of 90612840 is 4821609.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 90612798 and 90612807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377434 + ... + 377673.

It is an arithmetic number, because the mean of its divisors is an integer number (8494965).

Almost surely, 2^90612840 is an apocalyptic number.

It is an amenable number.

90612840 is an abundant number, since it is smaller than the sum of its proper divisors (181226040).

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

90612840 is a wasteful number, since it uses less digits than its factorization.

90612840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755121 (or 755117 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 90612840 is about 9519.0776864148. The cubic root of 90612840 is about 449.1553538700.

The spelling of 90612840 in words is "ninety million, six hundred twelve thousand, eight hundred forty".