72529778 has 8 divisors (see below), whose sum is σ = 110418672. Its totient is φ = 35723556.

The previous prime is 72529763. The next prime is 72529781. The reversal of 72529778 is 87792527.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270500 + ... + 270767.

It is an arithmetic number, because the mean of its divisors is an integer number (13802334).

Almost surely, 2^72529778 is an apocalyptic number.

72529778 is a deficient number, since it is larger than the sum of its proper divisors (37888894).

72529778 is a wasteful number, since it uses less digits than its factorization.

72529778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541336.

The product of its digits is 493920, while the sum is 47.

The square root of 72529778 is about 8516.4416278162. The cubic root of 72529778 is about 417.0346264955.

It can be divided in two parts, 725 and 29778, that added together give a palindrome (30503).

The spelling of 72529778 in words is "seventy-two million, five hundred twenty-nine thousand, seven hundred seventy-eight".