2439972 has 18 divisors (see below), whose sum is σ = 6167798. Its totient is φ = 813312.

The previous prime is 2439953. The next prime is 2439977. The reversal of 2439972 is 2799342.

It can be written as a sum of positive squares in only one way, i.e., 2232036 + 207936 = 1494^2 + 456^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 67777 = 2439972 / (2 + 4 + 3 + 9 + 9 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (2439977) 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, 33853 + ... + 33924.

2^2439972 is an apocalyptic number.

It is an amenable number.

2439972 is an abundant number, since it is smaller than the sum of its proper divisors (3727826).

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

2439972 is a wasteful number, since it uses less digits than its factorization.

2439972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67787 (or 67782 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 2439972 is about 1562.0409725740. The cubic root of 2439972 is about 134.6257949793.

The spelling of 2439972 in words is "two million, four hundred thirty-nine thousand, nine hundred seventy-two".