72419428 has 6 divisors (see below), whose sum is σ = 126734006. Its totient is φ = 36209712.

The previous prime is 72419411. The next prime is 72419443. The reversal of 72419428 is 82491427.

It can be written as a sum of positive squares in only one way, i.e., 72284004 + 135424 = 8502^2 + 368^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052425 + ... + 9052432.

Almost surely, 2^72419428 is an apocalyptic number.

It is an amenable number.

72419428 is a deficient number, since it is larger than the sum of its proper divisors (54314578).

72419428 is a wasteful number, since it uses less digits than its factorization.

72419428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18104861 (or 18104859 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 72419428 is about 8509.9605169472. The cubic root of 72419428 is about 416.8230208585.

The spelling of 72419428 in words is "seventy-two million, four hundred nineteen thousand, four hundred twenty-eight".