145491940 has 24 divisors (see below), whose sum is σ = 333309312. Its totient is φ = 52906080.

The previous prime is 145491937. The next prime is 145491953. The reversal of 145491940 is 49194541.

It is a self number, because there is not a number n which added to its sum of digits gives 145491940.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330444 + ... + 330883.

It is an arithmetic number, because the mean of its divisors is an integer number (13887888).

Almost surely, 2^145491940 is an apocalyptic number.

145491940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145491940 is an abundant number, since it is smaller than the sum of its proper divisors (187817372).

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

145491940 is a wasteful number, since it uses less digits than its factorization.

145491940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661347 (or 661345 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 145491940 is about 12062.0039794389. The cubic root of 145491940 is about 525.9522430582.

The spelling of 145491940 in words is "one hundred forty-five million, four hundred ninety-one thousand, nine hundred forty".