120400794240 has 128 divisors (see below), whose sum is σ = 394150129920. Its totient is φ = 31239106560.

The previous prime is 120400794229. The next prime is 120400794251. The reversal of 120400794240 is 42497004021.

It is an interprime number because it is at equal distance from previous prime (120400794229) and next prime (120400794251).

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 776376 + ... + 918455.

It is an arithmetic number, because the mean of its divisors is an integer number (3079297890).

Almost surely, 2^120400794240 is an apocalyptic number.

120400794240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120400794240 is an abundant number, since it is smaller than the sum of its proper divisors (273749335680).

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

120400794240 is a wasteful number, since it uses less digits than its factorization.

120400794240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694890 (or 1694878 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 120400794240 its reverse (42497004021), we get a palindrome (162897798261).

The spelling of 120400794240 in words is "one hundred twenty billion, four hundred million, seven hundred ninety-four thousand, two hundred forty".