102087428 has 6 divisors (see below), whose sum is σ = 178653006. Its totient is φ = 51043712.

The previous prime is 102087413. The next prime is 102087449. The reversal of 102087428 is 824780201.

It can be written as a sum of positive squares in only one way, i.e., 56821444 + 45265984 = 7538^2 + 6728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102087394 and 102087403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760925 + ... + 12760932.

It is an arithmetic number, because the mean of its divisors is an integer number (29775501).

Almost surely, 2^102087428 is an apocalyptic number.

It is an amenable number.

102087428 is a deficient number, since it is larger than the sum of its proper divisors (76565578).

102087428 is a wasteful number, since it uses less digits than its factorization.

102087428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25521861 (or 25521859 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 102087428 is about 10103.8323422353. The cubic root of 102087428 is about 467.3663289467.

The spelling of 102087428 in words is "one hundred two million, eighty-seven thousand, four hundred twenty-eight".