155492730 has 128 divisors (see below), whose sum is σ = 433382400. Its totient is φ = 39638592.

The previous prime is 155492699. The next prime is 155492731. The reversal of 155492730 is 37294551.

It is not an unprimeable number, because it can be changed into a prime (155492731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 684877 + ... + 685103.

It is an arithmetic number, because the mean of its divisors is an integer number (3385800).

Almost surely, 2^155492730 is an apocalyptic number.

155492730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155492730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216691200).

155492730 is an abundant number, since it is smaller than the sum of its proper divisors (277889670).

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

155492730 is a wasteful number, since it uses less digits than its factorization.

155492730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 155492730 is about 12469.6724094902. The cubic root of 155492730 is about 537.7371356745.

The spelling of 155492730 in words is "one hundred fifty-five million, four hundred ninety-two thousand, seven hundred thirty".