145649720 has 16 divisors (see below), whose sum is σ = 327711960. Its totient is φ = 58259872.

The previous prime is 145649719. The next prime is 145649737. The reversal of 145649720 is 27946541.

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, 1820582 + ... + 1820661.

Almost surely, 2^145649720 is an apocalyptic number.

145649720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145649720 is an abundant number, since it is smaller than the sum of its proper divisors (182062240).

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

145649720 is a wasteful number, since it uses less digits than its factorization.

145649720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641254 (or 3641250 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 145649720 is about 12068.5425797815. The cubic root of 145649720 is about 526.1422988673.

The spelling of 145649720 in words is "one hundred forty-five million, six hundred forty-nine thousand, seven hundred twenty".