145757690 has 32 divisors (see below), whose sum is σ = 284222736. Its totient is φ = 53498880.

The previous prime is 145757687. The next prime is 145757707. The reversal of 145757690 is 96757541.

It can be written as a sum of positive squares in 8 ways, for example, as 108388921 + 37368769 = 10411^2 + 6113^2 .

It is a super-2 number, since 2×145757690² = 42490608388272200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19250 + ... + 25730.

Almost surely, 2^145757690 is an apocalyptic number.

145757690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145757690 is a deficient number, since it is larger than the sum of its proper divisors (138465046).

145757690 is a wasteful number, since it uses less digits than its factorization.

145757690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 145757690 is about 12073.0149507072. The cubic root of 145757690 is about 526.2722763518.

The spelling of 145757690 in words is "one hundred forty-five million, seven hundred fifty-seven thousand, six hundred ninety".