67972538 has 16 divisors (see below), whose sum is σ = 107574720. Its totient is φ = 32122656.

The previous prime is 67972537. The next prime is 67972561. The reversal of 67972538 is 83527976.

It is a super-2 number, since 2×67972538² = 9240531844322888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67972492 and 67972501.

It is not an unprimeable number, because it can be changed into a prime (67972537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16670 + ... + 20342.

It is an arithmetic number, because the mean of its divisors is an integer number (6723420).

Almost surely, 2^67972538 is an apocalyptic number.

67972538 is a deficient number, since it is larger than the sum of its proper divisors (39602182).

67972538 is a wasteful number, since it uses less digits than its factorization.

67972538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181.

The product of its digits is 635040, while the sum is 47.

The square root of 67972538 is about 8244.5459547509. The cubic root of 67972538 is about 408.1105565127.

The spelling of 67972538 in words is "sixty-seven million, nine hundred seventy-two thousand, five hundred thirty-eight".