28740415 has 8 divisors (see below), whose sum is σ = 37623888. Its totient is φ = 20902080.

The previous prime is 28740403. The next prime is 28740427. The reversal of 28740415 is 51404782.

It is an interprime number because it is at equal distance from previous prime (28740403) and next prime (28740427).

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

It is not a de Polignac number, because 28740415 - 2⁷ = 28740287 is a prime.

It is a super-2 number, since 2×28740415² = 1652022908744450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261222 + ... + 261331.

It is an arithmetic number, because the mean of its divisors is an integer number (4702986).

Almost surely, 2^28740415 is an apocalyptic number.

28740415 is a deficient number, since it is larger than the sum of its proper divisors (8883473).

28740415 is a wasteful number, since it uses less digits than its factorization.

28740415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522569.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 28740415 is about 5361.0087670139. The cubic root of 28740415 is about 306.3122355816.

The spelling of 28740415 in words is "twenty-eight million, seven hundred forty thousand, four hundred fifteen".