40378740 has 96 divisors (see below), whose sum is σ = 123669504. Its totient is φ = 9799680.

The previous prime is 40378721. The next prime is 40378769. The reversal of 40378740 is 4787304.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30982 + ... + 32258.

It is an arithmetic number, because the mean of its divisors is an integer number (1288224).

Almost surely, 2^40378740 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 40378740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61834752).

40378740 is an abundant number, since it is smaller than the sum of its proper divisors (83290764).

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

40378740 is a wasteful number, since it uses less digits than its factorization.

40378740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 40378740 is about 6354.4268034182. The cubic root of 40378740 is about 343.0711942134.

The spelling of 40378740 in words is "forty million, three hundred seventy-eight thousand, seven hundred forty".