40070772 has 72 divisors (see below), whose sum is σ = 121867200. Its totient is φ = 10844928.

The previous prime is 40070731. The next prime is 40070773. The reversal of 40070772 is 27707004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40070773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604 + ... + 8972.

It is an arithmetic number, because the mean of its divisors is an integer number (1692600).

Almost surely, 2^40070772 is an apocalyptic number.

40070772 is a gapful number since it is divisible by the number (42) 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 40070772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60933600).

40070772 is an abundant number, since it is smaller than the sum of its proper divisors (81796428).

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

40070772 is a wasteful number, since it uses less digits than its factorization.

40070772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8405 (or 8400 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 40070772 is about 6330.1478655715. The cubic root of 40070772 is about 342.1967678606.

Adding to 40070772 its reverse (27707004), we get a palindrome (67777776).

The spelling of 40070772 in words is "forty million, seventy thousand, seven hundred seventy-two".