72064242 has 20 divisors (see below), whose sum is σ = 161477646. Its totient is φ = 24021360.

The previous prime is 72064231. The next prime is 72064247. The reversal of 72064242 is 24246027.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 15046641 = 7551^2 + 3879^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (72064247) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 222259 + ... + 222582.

Almost surely, 2^72064242 is an apocalyptic number.

72064242 is an abundant number, since it is smaller than the sum of its proper divisors (89413404).

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

72064242 is a wasteful number, since it uses less digits than its factorization.

72064242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444855 (or 444846 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 72064242 is about 8489.0660263659. The cubic root of 72064242 is about 416.1404581486.

The spelling of 72064242 in words is "seventy-two million, sixty-four thousand, two hundred forty-two".