87778490 has 16 divisors (see below), whose sum is σ = 158257152. Its totient is φ = 35054544.

The previous prime is 87778487. The next prime is 87778517. The reversal of 87778490 is 9487778.

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, 314 + ... + 13253.

It is an arithmetic number, because the mean of its divisors is an integer number (9891072).

Almost surely, 2^87778490 is an apocalyptic number.

87778490 is a deficient number, since it is larger than the sum of its proper divisors (70478662).

87778490 is a wasteful number, since it uses less digits than its factorization.

87778490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14221.

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 87778490 is about 9369.0175578873. The cubic root of 87778490 is about 444.4224970875.

The spelling of 87778490 in words is "eighty-seven million, seven hundred seventy-eight thousand, four hundred ninety".