28949402 has 16 divisors (see below), whose sum is σ = 46182312. Its totient is φ = 13562880.

The previous prime is 28949399. The next prime is 28949423. The reversal of 28949402 is 20494982.

It can be written as a sum of positive squares in 4 ways, for example, as 28847641 + 101761 = 5371^2 + 319^2 .

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, 6428 + ... + 9960.

Almost surely, 2^28949402 is an apocalyptic number.

28949402 is a deficient number, since it is larger than the sum of its proper divisors (17232910).

28949402 is a wasteful number, since it uses less digits than its factorization.

28949402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 28949402 is about 5380.4648498062. The cubic root of 28949402 is about 307.0528968400.

The spelling of 28949402 in words is "twenty-eight million, nine hundred forty-nine thousand, four hundred two".