72187494 has 8 divisors (see below), whose sum is σ = 144375000. Its totient is φ = 24062496.

The previous prime is 72187487. The next prime is 72187541. The reversal of 72187494 is 49478127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

72187494 is an admirable number.

It is a super-2 number, since 2×72187494² = 10422068580000072, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6015619 + ... + 6015630.

It is an arithmetic number, because the mean of its divisors is an integer number (18046875).

Almost surely, 2^72187494 is an apocalyptic number.

72187494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72187494 is a wasteful number, since it uses less digits than its factorization.

72187494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031254.

The product of its digits is 112896, while the sum is 42.

The square root of 72187494 is about 8496.3223808893. The cubic root of 72187494 is about 416.3775657137.

The spelling of 72187494 in words is "seventy-two million, one hundred eighty-seven thousand, four hundred ninety-four".