102780100 has 36 divisors (see below), whose sum is σ = 232735104. Its totient is φ = 39323680.

The previous prime is 102780061. The next prime is 102780121. The reversal of 102780100 is 1087201.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20044 + ... + 24643.

It is an arithmetic number, because the mean of its divisors is an integer number (6464864).

Almost surely, 2^102780100 is an apocalyptic number.

102780100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102780100 is an abundant number, since it is smaller than the sum of its proper divisors (129955004).

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

102780100 is a wasteful number, since it uses less digits than its factorization.

102780100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44724 (or 44717 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 102780100 is about 10138.0520811446. The cubic root of 102780100 is about 468.4209874927.

The spelling of 102780100 in words is "one hundred two million, seven hundred eighty thousand, one hundred".