78529740 has 24 divisors (see below), whose sum is σ = 219883440. Its totient is φ = 20941248.

The previous prime is 78529733. The next prime is 78529741. The reversal of 78529740 is 4792587.

It is a junction number, because it is equal to n+sod(n) for n = 78529692 and 78529701.

It is not an unprimeable number, because it can be changed into a prime (78529741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 654355 + ... + 654474.

It is an arithmetic number, because the mean of its divisors is an integer number (9161810).

Almost surely, 2^78529740 is an apocalyptic number.

It is an amenable number.

78529740 is an abundant number, since it is smaller than the sum of its proper divisors (141353700).

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

78529740 is a wasteful number, since it uses less digits than its factorization.

78529740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308841 (or 1308839 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 78529740 is about 8861.7007397000. The cubic root of 78529740 is about 428.2309508496.

The spelling of 78529740 in words is "seventy-eight million, five hundred twenty-nine thousand, seven hundred forty".