72936442 has 4 divisors (see below), whose sum is σ = 109404666. Its totient is φ = 36468220.

The previous prime is 72936439. The next prime is 72936467. The reversal of 72936442 is 24463927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24463927 = 23 ⋅1063649.

It can be written as a sum of positive squares in only one way, i.e., 71588521 + 1347921 = 8461^2 + 1161^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18234109 + ... + 18234112.

Almost surely, 2^72936442 is an apocalyptic number.

72936442 is a deficient number, since it is larger than the sum of its proper divisors (36468224).

72936442 is a wasteful number, since it uses less digits than its factorization.

72936442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36468223.

The product of its digits is 72576, while the sum is 37.

The square root of 72936442 is about 8540.2834847562. The cubic root of 72936442 is about 417.8125919810.

The spelling of 72936442 in words is "seventy-two million, nine hundred thirty-six thousand, four hundred forty-two".