145687998 has 32 divisors (see below), whose sum is σ = 296407296. Its totient is φ = 47729088.

The previous prime is 145687987. The next prime is 145688009. The reversal of 145687998 is 899786541.

It is an interprime number because it is at equal distance from previous prime (145687987) and next prime (145688009).

It is a super-2 number, since 2×145687998² = 42449985522496008, which contains 22 as substring.

It is a congruent 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, 212965 + ... + 213647.

It is an arithmetic number, because the mean of its divisors is an integer number (9262728).

Almost surely, 2^145687998 is an apocalyptic number.

145687998 is an abundant number, since it is smaller than the sum of its proper divisors (150719298).

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

145687998 is a wasteful number, since it uses less digits than its factorization.

145687998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248.

The product of its digits is 4354560, while the sum is 57.

The square root of 145687998 is about 12070.1283340319. The cubic root of 145687998 is about 526.1883864050.

The spelling of 145687998 in words is "one hundred forty-five million, six hundred eighty-seven thousand, nine hundred ninety-eight".