72649522 has 8 divisors (see below), whose sum is σ = 118881072. Its totient is φ = 33022500.

The previous prime is 72649513. The next prime is 72649541. The reversal of 72649522 is 22594627.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1651104 + ... + 1651147.

It is an arithmetic number, because the mean of its divisors is an integer number (14860134).

Almost surely, 2^72649522 is an apocalyptic number.

72649522 is a deficient number, since it is larger than the sum of its proper divisors (46231550).

72649522 is a wasteful number, since it uses less digits than its factorization.

72649522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302264.

The product of its digits is 60480, while the sum is 37.

The square root of 72649522 is about 8523.4688947634. The cubic root of 72649522 is about 417.2640032621.

The spelling of 72649522 in words is "seventy-two million, six hundred forty-nine thousand, five hundred twenty-two".