155897940 has 48 divisors (see below), whose sum is σ = 476199360. Its totient is φ = 37793280.

The previous prime is 155897893. The next prime is 155897941. The reversal of 155897940 is 49798551.

155897940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 155897940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155897941) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 117445 + ... + 118764.

It is an arithmetic number, because the mean of its divisors is an integer number (9920820).

Almost surely, 2^155897940 is an apocalyptic number.

155897940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155897940 is an abundant number, since it is smaller than the sum of its proper divisors (320301420).

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

155897940 is a wasteful number, since it uses less digits than its factorization.

155897940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236232 (or 236230 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 48.

The square root of 155897940 is about 12485.9096584910. The cubic root of 155897940 is about 538.2038401539.

The spelling of 155897940 in words is "one hundred fifty-five million, eight hundred ninety-seven thousand, nine hundred forty".