78310740 has 96 divisors (see below), whose sum is σ = 227082240. Its totient is φ = 20151936.

The previous prime is 78310711. The next prime is 78310753. The reversal of 78310740 is 4701387.

It is a happy number.

It is a super-2 number, since 2×78310740² = 12265143998695200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 78310698 and 78310707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327541 + ... + 327779.

It is an arithmetic number, because the mean of its divisors is an integer number (2365440).

Almost surely, 2^78310740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78310740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113541120).

78310740 is an abundant number, since it is smaller than the sum of its proper divisors (148771500).

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

78310740 is a wasteful number, since it uses less digits than its factorization.

78310740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 78310740 is about 8849.3355682786. The cubic root of 78310740 is about 427.8325035338.

The spelling of 78310740 in words is "seventy-eight million, three hundred ten thousand, seven hundred forty".