72294040 has 64 divisors (see below), whose sum is σ = 200208960. Its totient is φ = 22878720.

The previous prime is 72294011. The next prime is 72294043. The reversal of 72294040 is 4049227.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72294043) 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 15 ways as a sum of consecutive naturals, for example, 6291 + ... + 13570.

It is an arithmetic number, because the mean of its divisors is an integer number (3128265).

Almost surely, 2^72294040 is an apocalyptic number.

72294040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72294040 is an abundant number, since it is smaller than the sum of its proper divisors (127914920).

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

72294040 is a wasteful number, since it uses less digits than its factorization.

72294040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19892 (or 19888 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 72294040 is about 8502.5901935822. The cubic root of 72294040 is about 416.5823175035.

The spelling of 72294040 in words is "seventy-two million, two hundred ninety-four thousand, forty".