78532740 has 288 divisors, whose sum is σ = 292795776. Its totient is φ = 17418240.

The previous prime is 78532739. The next prime is 78532793. The reversal of 78532740 is 4723587.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 78532695 and 78532704.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 694924 + ... + 695036.

It is an arithmetic number, because the mean of its divisors is an integer number (1016652).

Almost surely, 2^78532740 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 78532740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146397888).

78532740 is an abundant number, since it is smaller than the sum of its proper divisors (214263036).

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

78532740 is a wasteful number, since it uses less digits than its factorization.

78532740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 78532740 is about 8861.8700058171. The cubic root of 78532740 is about 428.2364038856.

The spelling of 78532740 in words is "seventy-eight million, five hundred thirty-two thousand, seven hundred forty".