90878380 has 24 divisors (see below), whose sum is σ = 191036160. Its totient is φ = 36314880.

The previous prime is 90878377. The next prime is 90878383. The reversal of 90878380 is 8387809.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90878377) and next prime (90878383).

It is not an unprimeable number, because it can be changed into a prime (90878383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27876 + ... + 30964.

It is an arithmetic number, because the mean of its divisors is an integer number (7959840).

Almost surely, 2^90878380 is an apocalyptic number.

It is an amenable number.

90878380 is an abundant number, since it is smaller than the sum of its proper divisors (100157780).

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

90878380 is a wasteful number, since it uses less digits than its factorization.

90878380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569 (or 4567 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 90878380 is about 9533.0152627592. The cubic root of 90878380 is about 449.5936743727.

The spelling of 90878380 in words is "ninety million, eight hundred seventy-eight thousand, three hundred eighty".