28215701390 has 8 divisors (see below), whose sum is σ = 50788262520. Its totient is φ = 11286280552.

The previous prime is 28215701389. The next prime is 28215701401. The reversal of 28215701390 is 9310751282.

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

It is a super-2 number, since 2×28215701390² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410785060 + ... + 1410785079.

It is an arithmetic number, because the mean of its divisors is an integer number (6348532815).

Almost surely, 2^28215701390 is an apocalyptic number.

28215701390 is a deficient number, since it is larger than the sum of its proper divisors (22572561130).

28215701390 is a wasteful number, since it uses less digits than its factorization.

28215701390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821570146.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 28215701390 in words is "twenty-eight billion, two hundred fifteen million, seven hundred one thousand, three hundred ninety".