72099690 has 64 divisors (see below), whose sum is σ = 187488000. Its totient is φ = 17639424.

The previous prime is 72099683. The next prime is 72099767. The reversal of 72099690 is 9699027.

It is a super-2 number, since 2×72099690² = 10396730596192200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77146 + ... + 78074.

It is an arithmetic number, because the mean of its divisors is an integer number (2929500).

Almost surely, 2^72099690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72099690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93744000).

72099690 is an abundant number, since it is smaller than the sum of its proper divisors (115388310).

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

72099690 is a wasteful number, since it uses less digits than its factorization.

72099690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 72099690 is about 8491.1536318689. The cubic root of 72099690 is about 416.2086793565.

The spelling of 72099690 in words is "seventy-two million, ninety-nine thousand, six hundred ninety".