28328401437 has 32 divisors (see below), whose sum is σ = 43333678080. Its totient is φ = 16125288960.

The previous prime is 28328401429. The next prime is 28328401457. The reversal of 28328401437 is 73410482382.

It is a happy number.

It is not a de Polignac number, because 28328401437 - 2³ = 28328401429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28328401457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14313514 + ... + 14315492.

It is an arithmetic number, because the mean of its divisors is an integer number (1354177440).

Almost surely, 2^28328401437 is an apocalyptic number.

It is an amenable number.

28328401437 is a deficient number, since it is larger than the sum of its proper divisors (15005276643).

28328401437 is a wasteful number, since it uses less digits than its factorization.

28328401437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4273.

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 28328401437 in words is "twenty-eight billion, three hundred twenty-eight million, four hundred one thousand, four hundred thirty-seven".