73781340 has 24 divisors (see below), whose sum is σ = 206587920. Its totient is φ = 19675008.

The previous prime is 73781317. The next prime is 73781363. The reversal of 73781340 is 4318737.

It is an interprime number because it is at equal distance from previous prime (73781317) and next prime (73781363).

It is a super-2 number, since 2×73781340² = 10887372264391200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614785 + ... + 614904.

It is an arithmetic number, because the mean of its divisors is an integer number (8607830).

Almost surely, 2^73781340 is an apocalyptic number.

It is an amenable number.

73781340 is an abundant number, since it is smaller than the sum of its proper divisors (132806580).

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

73781340 is a wasteful number, since it uses less digits than its factorization.

73781340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229701 (or 1229699 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 73781340 is about 8589.6065101959. The cubic root of 73781340 is about 419.4197201858.

The spelling of 73781340 in words is "seventy-three million, seven hundred eighty-one thousand, three hundred forty".