84457887 has 16 divisors (see below), whose sum is σ = 120336480. Its totient is φ = 52503552.

The previous prime is 84457883. The next prime is 84457903. The reversal of 84457887 is 78875448.

It is not a de Polignac number, because 84457887 - 2² = 84457883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84457883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2038 + ... + 13155.

It is an arithmetic number, because the mean of its divisors is an integer number (7521030).

Almost surely, 2^84457887 is an apocalyptic number.

84457887 is a deficient number, since it is larger than the sum of its proper divisors (35878593).

84457887 is a wasteful number, since it uses less digits than its factorization.

84457887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15322.

The product of its digits is 2007040, while the sum is 51.

The square root of 84457887 is about 9190.0972247305. The cubic root of 84457887 is about 438.7462362807.

The spelling of 84457887 in words is "eighty-four million, four hundred fifty-seven thousand, eight hundred eighty-seven".