90406028 has 12 divisors (see below), whose sum is σ = 166537560. Its totient is φ = 42823872.

The previous prime is 90406027. The next prime is 90406067. The reversal of 90406028 is 82060409.

It is not an unprimeable number, because it can be changed into a prime (90406027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594701 + ... + 594852.

It is an arithmetic number, because the mean of its divisors is an integer number (13878130).

Almost surely, 2^90406028 is an apocalyptic number.

It is an amenable number.

90406028 is a deficient number, since it is larger than the sum of its proper divisors (76131532).

90406028 is a wasteful number, since it uses less digits than its factorization.

90406028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189576 (or 1189574 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 90406028 is about 9508.2084537519. The cubic root of 90406028 is about 448.8133807122.

The spelling of 90406028 in words is "ninety million, four hundred six thousand, twenty-eight".