73195640 has 64 divisors (see below), whose sum is σ = 190848960. Its totient is φ = 24744960.

The previous prime is 73195631. The next prime is 73195643. The reversal of 73195640 is 4659137.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 73195640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73195643) 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, 18650 + ... + 22230.

It is an arithmetic number, because the mean of its divisors is an integer number (2982015).

Almost surely, 2^73195640 is an apocalyptic number.

73195640 is a gapful number since it is divisible by the number (70) 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 73195640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95424480).

73195640 is an abundant number, since it is smaller than the sum of its proper divisors (117653320).

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

73195640 is a wasteful number, since it uses less digits than its factorization.

73195640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672 (or 3668 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 73195640 is about 8555.4450497914. The cubic root of 73195640 is about 418.3069409055.

The spelling of 73195640 in words is "seventy-three million, one hundred ninety-five thousand, six hundred forty".