87478890 has 32 divisors (see below), whose sum is σ = 219079296. Its totient is φ = 22313280.

The previous prime is 87478873. The next prime is 87478921. The reversal of 87478890 is 9887478.

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, 62701 + ... + 64080.

It is an arithmetic number, because the mean of its divisors is an integer number (6846228).

Almost surely, 2^87478890 is an apocalyptic number.

87478890 is an abundant number, since it is smaller than the sum of its proper divisors (131600406).

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

87478890 is a wasteful number, since it uses less digits than its factorization.

87478890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126814.

The product of its (nonzero) digits is 903168, while the sum is 51.

The square root of 87478890 is about 9353.0150219060. The cubic root of 87478890 is about 443.9162958027.

The spelling of 87478890 in words is "eighty-seven million, four hundred seventy-eight thousand, eight hundred ninety".