145811996 has 48 divisors (see below), whose sum is σ = 292723200. Its totient is φ = 62905920.

The previous prime is 145811987. The next prime is 145811999. The reversal of 145811996 is 699118541.

It is a super-2 number, since 2×145811996² = 42522276355008032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145811999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150305 + ... + 151271.

It is an arithmetic number, because the mean of its divisors is an integer number (6098400).

Almost surely, 2^145811996 is an apocalyptic number.

145811996 is the 6455-th centered heptagonal number.

It is an amenable number.

145811996 is an abundant number, since it is smaller than the sum of its proper divisors (146911204).

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

145811996 is a wasteful number, since it uses less digits than its factorization.

145811996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154 (or 1152 counting only the distinct ones).

The product of its digits is 77760, while the sum is 44.

The square root of 145811996 is about 12075.2638066421. The cubic root of 145811996 is about 526.3376272630.

The spelling of 145811996 in words is "one hundred forty-five million, eight hundred eleven thousand, nine hundred ninety-six".