72174020 has 12 divisors (see below), whose sum is σ = 151565484. Its totient is φ = 28869600.

The previous prime is 72174017. The next prime is 72174029. The reversal of 72174020 is 2047127.

It can be written as a sum of positive squares in 2 ways, for example, as 56190016 + 15984004 = 7496^2 + 3998^2 .

It is not an unprimeable number, because it can be changed into a prime (72174029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804331 + ... + 1804370.

It is an arithmetic number, because the mean of its divisors is an integer number (12630457).

Almost surely, 2^72174020 is an apocalyptic number.

It is an amenable number.

72174020 is an abundant number, since it is smaller than the sum of its proper divisors (79391464).

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

72174020 is a wasteful number, since it uses less digits than its factorization.

72174020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608710 (or 3608708 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 72174020 is about 8495.5294125793. The cubic root of 72174020 is about 416.3516580848.

The spelling of 72174020 in words is "seventy-two million, one hundred seventy-four thousand, twenty".