145427644 has 6 divisors (see below), whose sum is σ = 254498384. Its totient is φ = 72713820.

The previous prime is 145427629. The next prime is 145427683. The reversal of 145427644 is 446724541.

It is a super-2 number, since 2×145427644² = 42298399278781472, which contains 22 as substring.

It is a congruent 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 as a sum of consecutive naturals, namely, 18178452 + ... + 18178459.

Almost surely, 2^145427644 is an apocalyptic number.

It is an amenable number.

145427644 is a deficient number, since it is larger than the sum of its proper divisors (109070740).

145427644 is a wasteful number, since it uses less digits than its factorization.

145427644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36356915 (or 36356913 counting only the distinct ones).

The product of its digits is 107520, while the sum is 37.

The square root of 145427644 is about 12059.3384561509. The cubic root of 145427644 is about 525.8747551276.

The spelling of 145427644 in words is "one hundred forty-five million, four hundred twenty-seven thousand, six hundred forty-four".