78150740 has 12 divisors (see below), whose sum is σ = 164116596. Its totient is φ = 31260288.

The previous prime is 78150731. The next prime is 78150769. The reversal of 78150740 is 4705187.

It can be written as a sum of positive squares in 2 ways, for example, as 24245776 + 53904964 = 4924^2 + 7342^2 .

It is a super-2 number, since 2×78150740² = 12215076325095200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78150697 and 78150706.

It is a congruent number.

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, 1953749 + ... + 1953788.

It is an arithmetic number, because the mean of its divisors is an integer number (13676383).

Almost surely, 2^78150740 is an apocalyptic number.

It is an amenable number.

78150740 is an abundant number, since it is smaller than the sum of its proper divisors (85965856).

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

78150740 is a wasteful number, since it uses less digits than its factorization.

78150740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907546 (or 3907544 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 78150740 is about 8840.2907192015. The cubic root of 78150740 is about 427.5409306136.

The spelling of 78150740 in words is "seventy-eight million, one hundred fifty thousand, seven hundred forty".