402845387 has 4 divisors (see below), whose sum is σ = 460394736. Its totient is φ = 345296040.

The previous prime is 402845383. The next prime is 402845389. The reversal of 402845387 is 783548204.

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

It is a cyclic number.

It is not a de Polignac number, because 402845387 - 2² = 402845383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402845383) 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, 28774664 + ... + 28774677.

It is an arithmetic number, because the mean of its divisors is an integer number (115098684).

Almost surely, 2^402845387 is an apocalyptic number.

402845387 is a deficient number, since it is larger than the sum of its proper divisors (57549349).

402845387 is an equidigital number, since it uses as much as digits as its factorization.

402845387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57549348.

The product of its (nonzero) digits is 215040, while the sum is 41.

The square root of 402845387 is about 20071.0086193993. The cubic root of 402845387 is about 738.5492559728.

The spelling of 402845387 in words is "four hundred two million, eight hundred forty-five thousand, three hundred eighty-seven".