155445400 has 48 divisors (see below), whose sum is σ = 394271640. Its totient is φ = 56524800.

The previous prime is 155445349. The next prime is 155445413. The reversal of 155445400 is 4544551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33129 + ... + 37528.

Almost surely, 2^155445400 is an apocalyptic number.

155445400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155445400 is an abundant number, since it is smaller than the sum of its proper divisors (238826240).

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

155445400 is a wasteful number, since it uses less digits than its factorization.

155445400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70684 (or 70675 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 155445400 is about 12467.7744605844. The cubic root of 155445400 is about 537.6825700337.

Adding to 155445400 its reverse (4544551), we get a palindrome (159989951).

The spelling of 155445400 in words is "one hundred fifty-five million, four hundred forty-five thousand, four hundred".