155267840 has 288 divisors, whose sum is σ = 483495936. Its totient is φ = 46448640.

The previous prime is 155267839. The next prime is 155267843. The reversal of 155267840 is 48762551.

It is a junction number, because it is equal to n+sod(n) for n = 155267794 and 155267803.

It is not an unprimeable number, because it can be changed into a prime (155267843) 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, 3610859 + ... + 3610901.

Almost surely, 2^155267840 is an apocalyptic number.

155267840 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 155267840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241747968).

155267840 is an abundant number, since it is smaller than the sum of its proper divisors (328228096).

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

155267840 is a wasteful number, since it uses less digits than its factorization.

155267840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 155267840 is about 12460.6516683519. The cubic root of 155267840 is about 537.4777665222.

The spelling of 155267840 in words is "one hundred fifty-five million, two hundred sixty-seven thousand, eight hundred forty".