40007429878 has 16 divisors (see below), whose sum is σ = 66130351056. Its totient is φ = 18035549280.

The previous prime is 40007429849. The next prime is 40007429881. The reversal of 40007429878 is 87892470004.

40007429878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 17891293 + ... + 17893528.

It is an arithmetic number, because the mean of its divisors is an integer number (4133146941).

Almost surely, 2^40007429878 is an apocalyptic number.

40007429878 is a deficient number, since it is larger than the sum of its proper divisors (26122921178).

40007429878 is a wasteful number, since it uses less digits than its factorization.

40007429878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35784879.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 40007429878 in words is "forty billion, seven million, four hundred twenty-nine thousand, eight hundred seventy-eight".