402728973 has 8 divisors (see below), whose sum is σ = 538255200. Its totient is φ = 267844368.

The previous prime is 402728941. The next prime is 402728981. The reversal of 402728973 is 379827204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402728973 - 2⁵ = 402728941 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402728983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158938 + ... + 161451.

It is an arithmetic number, because the mean of its divisors is an integer number (67281900).

Almost surely, 2^402728973 is an apocalyptic number.

It is an amenable number.

402728973 is a deficient number, since it is larger than the sum of its proper divisors (135526227).

402728973 is a wasteful number, since it uses less digits than its factorization.

402728973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320811.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 402728973 is about 20068.1083562951. The cubic root of 402728973 is about 738.4781072897.

The spelling of 402728973 in words is "four hundred two million, seven hundred twenty-eight thousand, nine hundred seventy-three".