90810547428 has 48 divisors (see below), whose sum is σ = 217087329536. Its totient is φ = 29529632160.

The previous prime is 90810547379. The next prime is 90810547507. The reversal of 90810547428 is 82474501809.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309975 + ... + 526977.

Almost surely, 2^90810547428 is an apocalyptic number.

It is an amenable number.

90810547428 is an abundant number, since it is smaller than the sum of its proper divisors (126276782108).

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

90810547428 is a wasteful number, since it uses less digits than its factorization.

90810547428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217864 (or 217862 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 90810547428 in words is "ninety billion, eight hundred ten million, five hundred forty-seven thousand, four hundred twenty-eight".