72102078 has 24 divisors (see below), whose sum is σ = 157014000. Its totient is φ = 23912064.

The previous prime is 72102077. The next prime is 72102113. The reversal of 72102078 is 87020127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6483 + ... + 13646.

It is an arithmetic number, because the mean of its divisors is an integer number (6542250).

Almost surely, 2^72102078 is an apocalyptic number.

72102078 is an abundant number, since it is smaller than the sum of its proper divisors (84911922).

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

72102078 is a wasteful number, since it uses less digits than its factorization.

72102078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20336 (or 20333 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 72102078 is about 8491.2942476398. The cubic root of 72102078 is about 416.2132743617.

The spelling of 72102078 in words is "seventy-two million, one hundred two thousand, seventy-eight".