100428690 has 32 divisors (see below), whose sum is σ = 255208320. Its totient is φ = 25205504.

The previous prime is 100428689. The next prime is 100428703. The reversal of 100428690 is 96824001.

It is a super-2 number, since 2×100428690² = 20171843550232200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97950 + ... + 98969.

It is an arithmetic number, because the mean of its divisors is an integer number (7975260).

Almost surely, 2^100428690 is an apocalyptic number.

100428690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100428690 is an abundant number, since it is smaller than the sum of its proper divisors (154779630).

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

100428690 is a wasteful number, since it uses less digits than its factorization.

100428690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196946.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 100428690 is about 10021.4115772181. The cubic root of 100428690 is about 464.8212053972.

The spelling of 100428690 in words is "one hundred million, four hundred twenty-eight thousand, six hundred ninety".