145403878 has 4 divisors (see below), whose sum is σ = 218105820. Its totient is φ = 72701938.

The previous prime is 145403833. The next prime is 145403879. The reversal of 145403878 is 878304541.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×145403878² = 42284575474877768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 145403878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145403879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36350968 + ... + 36350971.

It is an arithmetic number, because the mean of its divisors is an integer number (54526455).

Almost surely, 2^145403878 is an apocalyptic number.

145403878 is a deficient number, since it is larger than the sum of its proper divisors (72701942).

145403878 is an equidigital number, since it uses as much as digits as its factorization.

145403878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72701941.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 145403878 is about 12058.3530384543. The cubic root of 145403878 is about 525.8461071577.

The spelling of 145403878 in words is "one hundred forty-five million, four hundred three thousand, eight hundred seventy-eight".