156221460 has 120 divisors (see below), whose sum is σ = 497161896. Its totient is φ = 41057280.

The previous prime is 156221459. The next prime is 156221489. The reversal of 156221460 is 64122651.

It can be written as a sum of positive squares in 4 ways, for example, as 51322896 + 104898564 = 7164^2 + 10242^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 117600 + ... + 118920.

Almost surely, 2^156221460 is an apocalyptic number.

156221460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156221460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248580948).

156221460 is an abundant number, since it is smaller than the sum of its proper divisors (340940436).

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

156221460 is a wasteful number, since it uses less digits than its factorization.

156221460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 156221460 is about 12498.8583478652. The cubic root of 156221460 is about 538.5758771426.

The spelling of 156221460 in words is "one hundred fifty-six million, two hundred twenty-one thousand, four hundred sixty".