145366640 has 20 divisors (see below), whose sum is σ = 337977624. Its totient is φ = 58146624.

The previous prime is 145366633. The next prime is 145366667. The reversal of 145366640 is 46663541.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×145366640² = 42262920049779200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 145366640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908462 + ... + 908621.

Almost surely, 2^145366640 is an apocalyptic number.

145366640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145366640 is an abundant number, since it is smaller than the sum of its proper divisors (192610984).

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

145366640 is a wasteful number, since it uses less digits than its factorization.

145366640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817096 (or 1817090 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 145366640 is about 12056.8088647038. The cubic root of 145366640 is about 525.8012135151.

The spelling of 145366640 in words is "one hundred forty-five million, three hundred sixty-six thousand, six hundred forty".