15228738 has 24 divisors (see below), whose sum is σ = 37709568. Its totient is φ = 4351032.

The previous prime is 15228727. The next prime is 15228743. The reversal of 15228738 is 83782251.

15228738 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15228738² = 463828922145288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60306 + ... + 60557.

It is an arithmetic number, because the mean of its divisors is an integer number (1571232).

Almost surely, 2^15228738 is an apocalyptic number.

15228738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15228738 is an abundant number, since it is smaller than the sum of its proper divisors (22480830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15228738 is a wasteful number, since it uses less digits than its factorization.

15228738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120878 (or 120875 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 15228738 is about 3902.4015682654. The cubic root of 15228738 is about 247.8684808202.

The spelling of 15228738 in words is "fifteen million, two hundred twenty-eight thousand, seven hundred thirty-eight".