145407438 has 24 divisors (see below), whose sum is σ = 343690776. Its totient is φ = 44062800.

The previous prime is 145407419. The next prime is 145407439. The reversal of 145407438 is 834704541.

145407438 is a `hidden beast` number, since 14 + 540 + 74 + 38 = 666.

It is a super-2 number, since 2×145407438² = 42286646051447688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145407439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366993 + ... + 367388.

It is an arithmetic number, because the mean of its divisors is an integer number (14320449).

Almost surely, 2^145407438 is an apocalyptic number.

145407438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

145407438 is an abundant number, since it is smaller than the sum of its proper divisors (198283338).

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

145407438 is a wasteful number, since it uses less digits than its factorization.

145407438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734400 (or 734397 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 145407438 is about 12058.5006530663. The cubic root of 145407438 is about 525.8503986454.

The spelling of 145407438 in words is "one hundred forty-five million, four hundred seven thousand, four hundred thirty-eight".