155940000 has 240 divisors, whose sum is σ = 538477632. Its totient is φ = 39424000.

The previous prime is 155939983. The next prime is 155940017. The reversal of 155940000 is 49551.

It is an interprime number because it is at equal distance from previous prime (155939983) and next prime (155940017).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1379944 + ... + 1380056.

Almost surely, 2^155940000 is an apocalyptic number.

155940000 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 155940000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269238816).

155940000 is an abundant number, since it is smaller than the sum of its proper divisors (382537632).

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

155940000 is a wasteful number, since it uses less digits than its factorization.

155940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 155940000 is about 12487.5938434912. The cubic root of 155940000 is about 538.2522368124.

Adding to 155940000 its reverse (49551), we get a palindrome (155989551).

The spelling of 155940000 in words is "one hundred fifty-five million, nine hundred forty thousand".