28361013431 has 16 divisors (see below), whose sum is σ = 29825230848. Its totient is φ = 26935524000.

The previous prime is 28361013427. The next prime is 28361013469. The reversal of 28361013431 is 13431016382.

It is a cyclic number.

It is not a de Polignac number, because 28361013431 - 2² = 28361013427 is a prime.

It is a super-2 number, since 2×28361013431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28361013731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352025 + ... + 425021.

It is an arithmetic number, because the mean of its divisors is an integer number (1864076928).

Almost surely, 2^28361013431 is an apocalyptic number.

28361013431 is a deficient number, since it is larger than the sum of its proper divisors (1464217417).

28361013431 is a wasteful number, since it uses less digits than its factorization.

28361013431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73262.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 28361013431 in words is "twenty-eight billion, three hundred sixty-one million, thirteen thousand, four hundred thirty-one".