40739440 has 80 divisors (see below), whose sum is σ = 112992768. Its totient is φ = 13356288.

The previous prime is 40739393. The next prime is 40739443. The reversal of 40739440 is 4493704.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40739443) 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, 11299 + ... + 14461.

Almost surely, 2^40739440 is an apocalyptic number.

40739440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40739440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56496384).

40739440 is an abundant number, since it is smaller than the sum of its proper divisors (72253328).

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

40739440 is a wasteful number, since it uses less digits than its factorization.

40739440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 40739440 is about 6382.7454907743. The cubic root of 40739440 is about 344.0897097922.

The spelling of 40739440 in words is "forty million, seven hundred thirty-nine thousand, four hundred forty".