120891380 has 12 divisors (see below), whose sum is σ = 253871940. Its totient is φ = 48356544.

The previous prime is 120891377. The next prime is 120891451. The reversal of 120891380 is 83198021.

It can be written as a sum of positive squares in 2 ways, for example, as 47720464 + 73170916 = 6908^2 + 8554^2 .

It is a super-2 number, since 2×120891380² = 29229451516608800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3022265 + ... + 3022304.

It is an arithmetic number, because the mean of its divisors is an integer number (21155995).

Almost surely, 2^120891380 is an apocalyptic number.

120891380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120891380 is an abundant number, since it is smaller than the sum of its proper divisors (132980560).

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

120891380 is a wasteful number, since it uses less digits than its factorization.

120891380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6044578 (or 6044576 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 120891380 is about 10995.0616187450. The cubic root of 120891380 is about 494.4606989097.

The spelling of 120891380 in words is "one hundred twenty million, eight hundred ninety-one thousand, three hundred eighty".