989157474 has 32 divisors (see below), whose sum is σ = 2199234240. Its totient is φ = 329553216.

The previous prime is 989157473. The next prime is 989157487. The reversal of 989157474 is 474751989.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 989157474.

It is not an unprimeable number, because it can be changed into a prime (989157473) 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, 153277 + ... + 159599.

It is an arithmetic number, because the mean of its divisors is an integer number (68726070).

Almost surely, 2^989157474 is an apocalyptic number.

989157474 is an abundant number, since it is smaller than the sum of its proper divisors (1210076766).

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

989157474 is a wasteful number, since it uses less digits than its factorization.

989157474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231 (or 9225 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 989157474 is about 31450.8739783174. The cubic root of 989157474 is about 996.3726831478.

The spelling of 989157474 in words is "nine hundred eighty-nine million, one hundred fifty-seven thousand, four hundred seventy-four".