78101072 has 40 divisors (see below), whose sum is σ = 176970816. Its totient is φ = 32691456.

The previous prime is 78101071. The next prime is 78101081. The reversal of 78101072 is 27010187.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78101071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3293 + ... + 12924.

Almost surely, 2^78101072 is an apocalyptic number.

It is an amenable number.

78101072 is an abundant number, since it is smaller than the sum of its proper divisors (98869744).

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

78101072 is a wasteful number, since it uses less digits than its factorization.

78101072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16275 (or 16269 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 78101072 is about 8837.4810890887. The cubic root of 78101072 is about 427.4503381546.

The spelling of 78101072 in words is "seventy-eight million, one hundred one thousand, seventy-two".