78748400 has 30 divisors (see below), whose sum is σ = 189193992. Its totient is φ = 31499200.

The previous prime is 78748399. The next prime is 78748409. The reversal of 78748400 is 484787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78748409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98036 + ... + 98835.

Almost surely, 2^78748400 is an apocalyptic number.

It is an amenable number.

78748400 is an abundant number, since it is smaller than the sum of its proper divisors (110445592).

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

78748400 is a wasteful number, since it uses less digits than its factorization.

78748400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196889 (or 196878 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 78748400 is about 8874.0295244043. The cubic root of 78748400 is about 428.6280411986.

The spelling of 78748400 in words is "seventy-eight million, seven hundred forty-eight thousand, four hundred".