78747876 has 135 divisors (see below), whose sum is σ = 226485259. Its totient is φ = 23853312.

The previous prime is 78747853. The next prime is 78747881. The reversal of 78747876 is 67874787.

It is a happy number.

The square root of 78747876 is 8874.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7784100 + 70963776 = 2790^2 + 8424^2 .

It is a super-2 number, since 2×78747876² = 12402455949022752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2715430 + ... + 2715458.

Almost surely, 2^78747876 is an apocalyptic number.

78747876 is the 8874-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78747876

78747876 is an abundant number, since it is smaller than the sum of its proper divisors (147737383).

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

78747876 is a wasteful number, since it uses less digits than its factorization.

78747876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 51 counting only the distinct ones).

The product of its digits is 3687936, while the sum is 54.

The cubic root of 78747876 is about 428.6270904847.

The spelling of 78747876 in words is "seventy-eight million, seven hundred forty-seven thousand, eight hundred seventy-six".