155120394 has 32 divisors (see below), whose sum is σ = 364480704. Its totient is φ = 43390080.

The previous prime is 155120387. The next prime is 155120419. The reversal of 155120394 is 493021551.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89539 + ... + 91254.

It is an arithmetic number, because the mean of its divisors is an integer number (11390022).

Almost surely, 2^155120394 is an apocalyptic number.

155120394 is an abundant number, since it is smaller than the sum of its proper divisors (209360310).

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

155120394 is a wasteful number, since it uses less digits than its factorization.

155120394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180822.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 155120394 is about 12454.7337988413. The cubic root of 155120394 is about 537.3075787882.

It can be divided in two parts, 1551 and 20394, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 155120394 in words is "one hundred fifty-five million, one hundred twenty thousand, three hundred ninety-four".