102500028 has 36 divisors (see below), whose sum is σ = 259751128. Its totient is φ = 34080480.

The previous prime is 102500023. The next prime is 102500077. The reversal of 102500028 is 820005201.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102500023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11775 + ... + 18537.

Almost surely, 2^102500028 is an apocalyptic number.

102500028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

102500028 is an abundant number, since it is smaller than the sum of its proper divisors (157251100).

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

102500028 is a wasteful number, since it uses less digits than its factorization.

102500028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194 (or 7189 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 102500028 is about 10124.2297484796. The cubic root of 102500028 is about 467.9951237712.

Adding to 102500028 its reverse (820005201), we get a palindrome (922505229).

The spelling of 102500028 in words is "one hundred two million, five hundred thousand, twenty-eight".