40449428 has 12 divisors (see below), whose sum is σ = 71221920. Its totient is φ = 20100312.

The previous prime is 40449421. The next prime is 40449491. The reversal of 40449428 is 82494404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40449421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30368 + ... + 31671.

It is an arithmetic number, because the mean of its divisors is an integer number (5935160).

Almost surely, 2^40449428 is an apocalyptic number.

It is an amenable number.

40449428 is a deficient number, since it is larger than the sum of its proper divisors (30772492).

40449428 is a wasteful number, since it uses less digits than its factorization.

40449428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62206 (or 62204 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 40449428 is about 6359.9864779730. The cubic root of 40449428 is about 343.2712737507.

The spelling of 40449428 in words is "forty million, four hundred forty-nine thousand, four hundred twenty-eight".