1972647532 has 24 divisors (see below), whose sum is σ = 3686006016. Its totient is φ = 921497808.

The previous prime is 1972647499. The next prime is 1972647533. The reversal of 1972647532 is 2357462791.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (1972647533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245368 + ... + 253279.

It is an arithmetic number, because the mean of its divisors is an integer number (153583584).

Almost surely, 2^1972647532 is an apocalyptic number.

It is an amenable number.

1972647532 is a deficient number, since it is larger than the sum of its proper divisors (1713358484).

1972647532 is a wasteful number, since it uses less digits than its factorization.

1972647532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498717 (or 498715 counting only the distinct ones).

The product of its digits is 635040, while the sum is 46.

The square root of 1972647532 is about 44414.4968675769. The cubic root of 1972647532 is about 1254.1510068814.

The spelling of 1972647532 in words is "one billion, nine hundred seventy-two million, six hundred forty-seven thousand, five hundred thirty-two".