72011754 has 20 divisors (see below), whose sum is σ = 161360034. Its totient is φ = 24003864.

The previous prime is 72011743. The next prime is 72011759. The reversal of 72011754 is 45711027.

It can be written as a sum of positive squares in only one way, i.e., 39350529 + 32661225 = 6273^2 + 5715^2 .

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 (72011759) 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, 222097 + ... + 222420.

Almost surely, 2^72011754 is an apocalyptic number.

72011754 is an abundant number, since it is smaller than the sum of its proper divisors (89348280).

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

72011754 is a wasteful number, since it uses less digits than its factorization.

72011754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444531 (or 444522 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 72011754 is about 8485.9739570659. The cubic root of 72011754 is about 416.0394016242.

The spelling of 72011754 in words is "seventy-two million, eleven thousand, seven hundred fifty-four".