72533842 has 4 divisors (see below), whose sum is σ = 108800766. Its totient is φ = 36266920.

The previous prime is 72533837. The next prime is 72533861. The reversal of 72533842 is 24833527.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72437121 + 96721 = 8511^2 + 311^2 .

It is a super-2 number, since 2×72533842² = 10522316470561928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72533798 and 72533807.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18133459 + ... + 18133462.

Almost surely, 2^72533842 is an apocalyptic number.

72533842 is a deficient number, since it is larger than the sum of its proper divisors (36266924).

72533842 is a wasteful number, since it uses less digits than its factorization.

72533842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36266923.

The product of its digits is 40320, while the sum is 34.

The square root of 72533842 is about 8516.6802217766. The cubic root of 72533842 is about 417.0424154667.

The spelling of 72533842 in words is "seventy-two million, five hundred thirty-three thousand, eight hundred forty-two".