145164440 has 16 divisors (see below), whose sum is σ = 326620080. Its totient is φ = 58065760.

The previous prime is 145164421. The next prime is 145164449. The reversal of 145164440 is 44461541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145164449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814516 + ... + 1814595.

It is an arithmetic number, because the mean of its divisors is an integer number (20413755).

Almost surely, 2^145164440 is an apocalyptic number.

145164440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145164440 is an abundant number, since it is smaller than the sum of its proper divisors (181455640).

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

145164440 is a wasteful number, since it uses less digits than its factorization.

145164440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629122 (or 3629118 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 145164440 is about 12048.4206433872. The cubic root of 145164440 is about 525.5573099209.

The spelling of 145164440 in words is "one hundred forty-five million, one hundred sixty-four thousand, four hundred forty".