53981658 has 12 divisors (see below), whose sum is σ = 116960298. Its totient is φ = 17993880.

The previous prime is 53981651. The next prime is 53981687. The reversal of 53981658 is 85618935.

It can be written as a sum of positive squares in only one way, i.e., 53978409 + 3249 = 7347^2 + 57^2 .

It is not an unprimeable number, because it can be changed into a prime (53981651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1499473 + ... + 1499508.

Almost surely, 2^53981658 is an apocalyptic number.

53981658 is an abundant number, since it is smaller than the sum of its proper divisors (62978640).

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

53981658 is a wasteful number, since it uses less digits than its factorization.

53981658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998989 (or 2998986 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 53981658 is about 7347.2211073303. The cubic root of 53981658 is about 377.9335148038.

It can be divided in two parts, 5398 and 1658, that added together give a square (7056 = 84²).

The spelling of 53981658 in words is "fifty-three million, nine hundred eighty-one thousand, six hundred fifty-eight".