40279956 has 48 divisors (see below), whose sum is σ = 97809600. Its totient is φ = 12886272.

The previous prime is 40279951. The next prime is 40279963. The reversal of 40279956 is 65997204.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40279951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98280 + ... + 98688.

It is an arithmetic number, because the mean of its divisors is an integer number (2037700).

Almost surely, 2^40279956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40279956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48904800).

40279956 is an abundant number, since it is smaller than the sum of its proper divisors (57529644).

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

40279956 is a wasteful number, since it uses less digits than its factorization.

40279956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 40279956 is about 6346.6491946538. The cubic root of 40279956 is about 342.7911985276.

The spelling of 40279956 in words is "forty million, two hundred seventy-nine thousand, nine hundred fifty-six".