940121638 has 8 divisors (see below), whose sum is σ = 1411222680. Its totient is φ = 469714080.

The previous prime is 940121597. The next prime is 940121639. The reversal of 940121638 is 836121049.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940121639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169968 + ... + 175411.

It is an arithmetic number, because the mean of its divisors is an integer number (176402835).

Almost surely, 2^940121638 is an apocalyptic number.

940121638 is a deficient number, since it is larger than the sum of its proper divisors (471101042).

940121638 is a wasteful number, since it uses less digits than its factorization.

940121638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346742.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 940121638 is about 30661.4030663960. The cubic root of 940121638 is about 979.6283604020.

The spelling of 940121638 in words is "nine hundred forty million, one hundred twenty-one thousand, six hundred thirty-eight".