100428514 has 4 divisors (see below), whose sum is σ = 150642774. Its totient is φ = 50214256.

The previous prime is 100428491. The next prime is 100428529. The reversal of 100428514 is 415824001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77704225 + 22724289 = 8815^2 + 4767^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25107127 + ... + 25107130.

Almost surely, 2^100428514 is an apocalyptic number.

100428514 is a deficient number, since it is larger than the sum of its proper divisors (50214260).

100428514 is an equidigital number, since it uses as much as digits as its factorization.

100428514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50214259.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 100428514 is about 10021.4027960161. The cubic root of 100428514 is about 464.8209338660.

The spelling of 100428514 in words is "one hundred million, four hundred twenty-eight thousand, five hundred fourteen".