90406587 has 8 divisors (see below), whose sum is σ = 120838480. Its totient is φ = 60122880.

The previous prime is 90406567. The next prime is 90406639. The reversal of 90406587 is 78560409.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90406587 - 2⁶ = 90406523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90406567) 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, 35614 + ... + 38067.

It is an arithmetic number, because the mean of its divisors is an integer number (15104810).

Almost surely, 2^90406587 is an apocalyptic number.

90406587 is a deficient number, since it is larger than the sum of its proper divisors (30431893).

90406587 is a wasteful number, since it uses less digits than its factorization.

90406587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74093.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 90406587 is about 9508.2378493599. The cubic root of 90406587 is about 448.8143057469.

The spelling of 90406587 in words is "ninety million, four hundred six thousand, five hundred eighty-seven".