28142392 has 8 divisors (see below), whose sum is σ = 52767000. Its totient is φ = 14071192.

The previous prime is 28142353. The next prime is 28142393. The reversal of 28142392 is 29324182.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28142393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1758892 + ... + 1758907.

It is an arithmetic number, because the mean of its divisors is an integer number (6595875).

Almost surely, 2^28142392 is an apocalyptic number.

It is an amenable number.

28142392 is a deficient number, since it is larger than the sum of its proper divisors (24624608).

28142392 is a wasteful number, since it uses less digits than its factorization.

28142392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517805 (or 3517801 counting only the distinct ones).

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

The square root of 28142392 is about 5304.9403389671. The cubic root of 28142392 is about 304.1727722884.

The spelling of 28142392 in words is "twenty-eight million, one hundred forty-two thousand, three hundred ninety-two".