145899930 has 32 divisors (see below), whose sum is σ = 381993408. Its totient is φ = 35369600.

The previous prime is 145899913. The next prime is 145899947. The reversal of 145899930 is 39998541.

It is an interprime number because it is at equal distance from previous prime (145899913) and next prime (145899947).

It is a self number, because there is not a number n which added to its sum of digits gives 145899930.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220731 + ... + 221390.

It is an arithmetic number, because the mean of its divisors is an integer number (11937294).

Almost surely, 2^145899930 is an apocalyptic number.

145899930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145899930 is an abundant number, since it is smaller than the sum of its proper divisors (236093478).

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

145899930 is a wasteful number, since it uses less digits than its factorization.

145899930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442142.

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 145899930 is about 12078.9043377287. The cubic root of 145899930 is about 526.4434111341.

The spelling of 145899930 in words is "one hundred forty-five million, eight hundred ninety-nine thousand, nine hundred thirty".