145538490 has 32 divisors (see below), whose sum is σ = 360562176. Its totient is φ = 37558080.

The previous prime is 145538483. The next prime is 145538507. The reversal of 145538490 is 94835541.

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, 77317 + ... + 79176.

It is an arithmetic number, because the mean of its divisors is an integer number (11267568).

Almost surely, 2^145538490 is an apocalyptic number.

145538490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145538490 is an abundant number, since it is smaller than the sum of its proper divisors (215023686).

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

145538490 is a wasteful number, since it uses less digits than its factorization.

145538490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156534.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 145538490 is about 12063.9334381453. The cubic root of 145538490 is about 526.0083297076.

The spelling of 145538490 in words is "one hundred forty-five million, five hundred thirty-eight thousand, four hundred ninety".