72815070 has 32 divisors (see below), whose sum is σ = 176867712. Its totient is φ = 19182752.

The previous prime is 72815047. The next prime is 72815101. The reversal of 72815070 is 7051827.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12132 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (5527116).

Almost surely, 2^72815070 is an apocalyptic number.

72815070 is an abundant number, since it is smaller than the sum of its proper divisors (104052642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72815070 is a wasteful number, since it uses less digits than its factorization.

72815070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29336.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 72815070 is about 8533.1746730042. The cubic root of 72815070 is about 417.5807055904.

Adding to 72815070 its reverse (7051827), we get a palindrome (79866897).

The spelling of 72815070 in words is "seventy-two million, eight hundred fifteen thousand, seventy".