72141690 has 16 divisors (see below), whose sum is σ = 173140128. Its totient is φ = 19237776.

The previous prime is 72141683. The next prime is 72141703. The reversal of 72141690 is 9614127.

It is a happy number.

It is a super-2 number, since 2×72141690² = 10408846872112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2404723 = 72141690 / (7 + 2 + 1 + 4 + 1 + 6 + 9 + 0).

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1202332 + ... + 1202391.

It is an arithmetic number, because the mean of its divisors is an integer number (10821258).

Almost surely, 2^72141690 is an apocalyptic number.

72141690 is an abundant number, since it is smaller than the sum of its proper divisors (100998438).

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

72141690 is a wasteful number, since it uses less digits than its factorization.

72141690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404733.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 72141690 is about 8493.6264339798. The cubic root of 72141690 is about 416.2894812356.

The spelling of 72141690 in words is "seventy-two million, one hundred forty-one thousand, six hundred ninety".