145695440 has 80 divisors (see below), whose sum is σ = 391314240. Its totient is φ = 49858560.

The previous prime is 145695397. The next prime is 145695467. The reversal of 145695440 is 44596541.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×145695440² = 42454322473587200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145695394 and 145695403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10091 + ... + 19829.

It is an arithmetic number, because the mean of its divisors is an integer number (4891428).

Almost surely, 2^145695440 is an apocalyptic number.

145695440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145695440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195657120).

145695440 is an abundant number, since it is smaller than the sum of its proper divisors (245618800).

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

145695440 is a wasteful number, since it uses less digits than its factorization.

145695440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9780 (or 9774 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 145695440 is about 12070.4366118215. The cubic root of 145695440 is about 526.1973457962.

The spelling of 145695440 in words is "one hundred forty-five million, six hundred ninety-five thousand, four hundred forty".