40078157 has 4 divisors (see below), whose sum is σ = 45803616. Its totient is φ = 34352700.

The previous prime is 40078147. The next prime is 40078219. The reversal of 40078157 is 75187004.

40078157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40078157 - 2¹² = 40074061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40078147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2862719 + ... + 2862732.

It is an arithmetic number, because the mean of its divisors is an integer number (11450904).

Almost surely, 2^40078157 is an apocalyptic number.

It is an amenable number.

40078157 is a deficient number, since it is larger than the sum of its proper divisors (5725459).

40078157 is an equidigital number, since it uses as much as digits as its factorization.

40078157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5725458.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 40078157 is about 6330.7311584050. The cubic root of 40078157 is about 342.2177887342.

The spelling of 40078157 in words is "forty million, seventy-eight thousand, one hundred fifty-seven".