28430762421 has 8 divisors (see below), whose sum is σ = 37930402720. Its totient is φ = 18942481872.

The previous prime is 28430762351. The next prime is 28430762431. The reversal of 28430762421 is 12426703482.

It is a happy number.

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

It is not a de Polignac number, because 28430762421 - 2¹⁵ = 28430729653 is a prime.

It is a super-3 number, since 3×28430762421³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28430762421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28430762431) 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, 2834095 + ... + 2844108.

It is an arithmetic number, because the mean of its divisors is an integer number (4741300340).

Almost surely, 2^28430762421 is an apocalyptic number.

It is an amenable number.

28430762421 is a deficient number, since it is larger than the sum of its proper divisors (9499640299).

28430762421 is a wasteful number, since it uses less digits than its factorization.

28430762421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679875.

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 28430762421 in words is "twenty-eight billion, four hundred thirty million, seven hundred sixty-two thousand, four hundred twenty-one".