428870145 has 32 divisors (see below), whose sum is σ = 768816000. Its totient is φ = 202314240.

The previous prime is 428870137. The next prime is 428870153. The reversal of 428870145 is 541078824.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (428870137) and next prime (428870153).

It is not a de Polignac number, because 428870145 - 2³ = 428870137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29020 + ... + 41229.

It is an arithmetic number, because the mean of its divisors is an integer number (24025500).

Almost surely, 2^428870145 is an apocalyptic number.

It is an amenable number.

428870145 is a deficient number, since it is larger than the sum of its proper divisors (339945855).

428870145 is a wasteful number, since it uses less digits than its factorization.

428870145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70305.

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 428870145 is about 20709.1802107181. The cubic root of 428870145 is about 754.1225688259.

The spelling of 428870145 in words is "four hundred twenty-eight million, eight hundred seventy thousand, one hundred forty-five".