72578603 has 8 divisors (see below), whose sum is σ = 73952256. Its totient is φ = 71217000.

The previous prime is 72578579. The next prime is 72578633. The reversal of 72578603 is 30687527.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72578603 - 2¹² = 72574507 is a prime.

It is a super-2 number, since 2×72578603² = 10535307226863218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72578633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9638 + ... + 15428.

It is an arithmetic number, because the mean of its divisors is an integer number (9244032).

Almost surely, 2^72578603 is an apocalyptic number.

72578603 is a deficient number, since it is larger than the sum of its proper divisors (1373653).

72578603 is a wasteful number, since it uses less digits than its factorization.

72578603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6025.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 72578603 is about 8519.3076596634. The cubic root of 72578603 is about 417.1281841529.

The spelling of 72578603 in words is "seventy-two million, five hundred seventy-eight thousand, six hundred three".