40479440 has 40 divisors (see below), whose sum is σ = 94398720. Its totient is φ = 16142976.

The previous prime is 40479437. The next prime is 40479451. The reversal of 40479440 is 4497404.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 40479397 and 40479406.

It is a congruent number.

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, 38441 + ... + 39479.

It is an arithmetic number, because the mean of its divisors is an integer number (2359968).

Almost surely, 2^40479440 is an apocalyptic number.

40479440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

40479440 is the 5195-th pentagonal number.

It is an amenable number.

40479440 is an abundant number, since it is smaller than the sum of its proper divisors (53919280).

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

40479440 is a wasteful number, since it uses less digits than its factorization.

40479440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 40479440 is about 6362.3454794596. The cubic root of 40479440 is about 343.3561510165.

The spelling of 40479440 in words is "forty million, four hundred seventy-nine thousand, four hundred forty".