102978388 has 24 divisors (see below), whose sum is σ = 186465384. Its totient is φ = 49728000.

The previous prime is 102978377. The next prime is 102978389. The reversal of 102978388 is 883879201.

It can be written as a sum of positive squares in 4 ways, for example, as 26030404 + 76947984 = 5102^2 + 8772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102978389) 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, 13456 + ... + 19672.

It is an arithmetic number, because the mean of its divisors is an integer number (7769391).

Almost surely, 2^102978388 is an apocalyptic number.

It is an amenable number.

102978388 is a deficient number, since it is larger than the sum of its proper divisors (83486996).

102978388 is a wasteful number, since it uses less digits than its factorization.

102978388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6363 (or 6361 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 102978388 is about 10147.8267624157. The cubic root of 102978388 is about 468.7220269411.

The spelling of 102978388 in words is "one hundred two million, nine hundred seventy-eight thousand, three hundred eighty-eight".