145691380 has 12 divisors (see below), whose sum is σ = 305951940. Its totient is φ = 58276544.

The previous prime is 145691347. The next prime is 145691387. The reversal of 145691380 is 83196541.

145691380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 55175184 + 90516196 = 7428^2 + 9514^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145691387) 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, 3642265 + ... + 3642304.

It is an arithmetic number, because the mean of its divisors is an integer number (25495995).

Almost surely, 2^145691380 is an apocalyptic number.

145691380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145691380 is an abundant number, since it is smaller than the sum of its proper divisors (160260560).

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

145691380 is a wasteful number, since it uses less digits than its factorization.

145691380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7284578 (or 7284576 counting only the distinct ones).

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

The square root of 145691380 is about 12070.2684311493. The cubic root of 145691380 is about 526.1924580178.

The spelling of 145691380 in words is "one hundred forty-five million, six hundred ninety-one thousand, three hundred eighty".