155345890 has 32 divisors (see below), whose sum is σ = 320166144. Its totient is φ = 53161920.

The previous prime is 155345873. The next prime is 155345891. The reversal of 155345890 is 98543551.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (155345891) 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, 42412 + ... + 45928.

It is an arithmetic number, because the mean of its divisors is an integer number (10005192).

Almost surely, 2^155345890 is an apocalyptic number.

155345890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155345890 is an abundant number, since it is smaller than the sum of its proper divisors (164820254).

155345890 is a wasteful number, since it uses less digits than its factorization.

155345890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4162.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 155345890 is about 12463.7831335434. The cubic root of 155345890 is about 537.5678111669.

The spelling of 155345890 in words is "one hundred fifty-five million, three hundred forty-five thousand, eight hundred ninety".