155470820 has 48 divisors (see below), whose sum is σ = 333923520. Its totient is φ = 60787584.

The previous prime is 155470813. The next prime is 155470829. The reversal of 155470820 is 28074551.

It is not an unprimeable number, because it can be changed into a prime (155470829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210011 + ... + 210749.

It is an arithmetic number, because the mean of its divisors is an integer number (6956740).

Almost surely, 2^155470820 is an apocalyptic number.

155470820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155470820 is an abundant number, since it is smaller than the sum of its proper divisors (178452700).

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

155470820 is a wasteful number, since it uses less digits than its factorization.

155470820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 155470820 is about 12468.7938470407. The cubic root of 155470820 is about 537.7118775289.

The spelling of 155470820 in words is "one hundred fifty-five million, four hundred seventy thousand, eight hundred twenty".