28412940 has 24 divisors (see below), whose sum is σ = 79556400. Its totient is φ = 7576768.

The previous prime is 28412911. The next prime is 28412963. The reversal of 28412940 is 4921482.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28412898 and 28412907.

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, 236715 + ... + 236834.

It is an arithmetic number, because the mean of its divisors is an integer number (3314850).

Almost surely, 2^28412940 is an apocalyptic number.

28412940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28412940 is an abundant number, since it is smaller than the sum of its proper divisors (51143460).

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

28412940 is a wasteful number, since it uses less digits than its factorization.

28412940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473561 (or 473559 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 28412940 is about 5330.3789733939. The cubic root of 28412940 is about 305.1443910073.

The spelling of 28412940 in words is "twenty-eight million, four hundred twelve thousand, nine hundred forty".