90877890 has 16 divisors (see below), whose sum is σ = 218107008. Its totient is φ = 24234096.

The previous prime is 90877889. The next prime is 90877939. The reversal of 90877890 is 9877809.

It is a Curzon number.

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, 1514602 + ... + 1514661.

It is an arithmetic number, because the mean of its divisors is an integer number (13631688).

Almost surely, 2^90877890 is an apocalyptic number.

90877890 is an abundant number, since it is smaller than the sum of its proper divisors (127229118).

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

90877890 is a wasteful number, since it uses less digits than its factorization.

90877890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029273.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 90877890 is about 9532.9895625664. The cubic root of 90877890 is about 449.5928663283.

The spelling of 90877890 in words is "ninety million, eight hundred seventy-seven thousand, eight hundred ninety".