40779136 has 64 divisors (see below), whose sum is σ = 86169600. Its totient is φ = 19192320.

The previous prime is 40779131. The next prime is 40779139. The reversal of 40779136 is 63197704.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 40779095 and 40779104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40779131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170505 + ... + 170743.

It is an arithmetic number, because the mean of its divisors is an integer number (1346400).

Almost surely, 2^40779136 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 40779136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43084800).

40779136 is an abundant number, since it is smaller than the sum of its proper divisors (45390464).

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

40779136 is a wasteful number, since it uses less digits than its factorization.

40779136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 40779136 is about 6385.8543672715. The cubic root of 40779136 is about 344.2014324139.

The spelling of 40779136 in words is "forty million, seven hundred seventy-nine thousand, one hundred thirty-six".