87406390 has 16 divisors (see below), whose sum is σ = 159324480. Its totient is φ = 34519680.

The previous prime is 87406373. The next prime is 87406399. The reversal of 87406390 is 9360478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87406399) 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, 54531 + ... + 56110.

It is an arithmetic number, because the mean of its divisors is an integer number (9957780).

Almost surely, 2^87406390 is an apocalyptic number.

87406390 is a deficient number, since it is larger than the sum of its proper divisors (71918090).

87406390 is a wasteful number, since it uses less digits than its factorization.

87406390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110727.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 87406390 is about 9349.1384629815. The cubic root of 87406390 is about 443.7936268686.

The spelling of 87406390 in words is "eighty-seven million, four hundred six thousand, three hundred ninety".