28400926 has 4 divisors (see below), whose sum is σ = 42601392. Its totient is φ = 14200462.

The previous prime is 28400917. The next prime is 28400927. The reversal of 28400926 is 62900482.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28400926² = 1613225195314952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28400927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7100230 + ... + 7100233.

It is an arithmetic number, because the mean of its divisors is an integer number (10650348).

Almost surely, 2^28400926 is an apocalyptic number.

28400926 is a deficient number, since it is larger than the sum of its proper divisors (14200466).

28400926 is a wasteful number, since it uses less digits than its factorization.

28400926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14200465.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28400926 is about 5329.2519174834. The cubic root of 28400926 is about 305.1013763159.

The spelling of 28400926 in words is "twenty-eight million, four hundred thousand, nine hundred twenty-six".