84742870 has 16 divisors (see below), whose sum is σ = 152859168. Its totient is φ = 33825600.

The previous prime is 84742849. The next prime is 84742891. The reversal of 84742870 is 7824748.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (84742849) and next prime (84742891).

It is a congruent number.

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, 3831 + ... + 13570.

It is an arithmetic number, because the mean of its divisors is an integer number (9553698).

Almost surely, 2^84742870 is an apocalyptic number.

84742870 is a deficient number, since it is larger than the sum of its proper divisors (68116298).

84742870 is a wasteful number, since it uses less digits than its factorization.

84742870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17895.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 84742870 is about 9205.5890631724. The cubic root of 84742870 is about 439.2391637909.

The spelling of 84742870 in words is "eighty-four million, seven hundred forty-two thousand, eight hundred seventy".