84774138 has 32 divisors (see below), whose sum is σ = 179915904. Its totient is φ = 26537472.

The previous prime is 84774127. The next prime is 84774139. The reversal of 84774138 is 83147748.

It is a self number, because there is not a number n which added to its sum of digits gives 84774138.

It is not an unprimeable number, because it can be changed into a prime (84774139) 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, 90006 + ... + 90942.

It is an arithmetic number, because the mean of its divisors is an integer number (5622372).

Almost surely, 2^84774138 is an apocalyptic number.

84774138 is an abundant number, since it is smaller than the sum of its proper divisors (95141766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84774138 is a wasteful number, since it uses less digits than its factorization.

84774138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846.

The product of its digits is 150528, while the sum is 42.

The square root of 84774138 is about 9207.2872226297. The cubic root of 84774138 is about 439.2931799039.

The spelling of 84774138 in words is "eighty-four million, seven hundred seventy-four thousand, one hundred thirty-eight".