361556140 has 96 divisors (see below), whose sum is σ = 853493760. Its totient is φ = 127545600.

The previous prime is 361556123. The next prime is 361556147. The reversal of 361556140 is 41655163.

361556140 = T₂₃₂ + T₂₃₃ + ... + T₁₂₉₆.

It is not an unprimeable number, because it can be changed into a prime (361556147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1233834 + ... + 1234126.

It is an arithmetic number, because the mean of its divisors is an integer number (8890560).

Almost surely, 2^361556140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 361556140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426746880).

361556140 is an abundant number, since it is smaller than the sum of its proper divisors (491937620).

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

361556140 is a wasteful number, since it uses less digits than its factorization.

361556140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 361556140 is about 19014.6296308921. The cubic root of 361556140 is about 712.4021919706.

The spelling of 361556140 in words is "three hundred sixty-one million, five hundred fifty-six thousand, one hundred forty".