428177157 has 4 divisors (see below), whose sum is σ = 570902880. Its totient is φ = 285451436.

The previous prime is 428177149. The next prime is 428177159. The reversal of 428177157 is 751771824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428177157 - 2³ = 428177149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428177159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71362857 + ... + 71362862.

It is an arithmetic number, because the mean of its divisors is an integer number (142725720).

Almost surely, 2^428177157 is an apocalyptic number.

It is an amenable number.

428177157 is a deficient number, since it is larger than the sum of its proper divisors (142725723).

428177157 is a wasteful number, since it uses less digits than its factorization.

428177157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142725722.

The product of its digits is 109760, while the sum is 42.

The square root of 428177157 is about 20692.4420260152. The cubic root of 428177157 is about 753.7161679382.

The spelling of 428177157 in words is "four hundred twenty-eight million, one hundred seventy-seven thousand, one hundred fifty-seven".