70371840 has 480 divisors, whose sum is σ = 302284224. Its totient is φ = 13762560.

The previous prime is 70371811. The next prime is 70371841. The reversal of 70371840 is 4817307.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 70371798 and 70371807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70371841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4139512 + ... + 4139528.

Almost surely, 2^70371840 is an apocalyptic number.

70371840 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 70371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151142112).

70371840 is an abundant number, since it is smaller than the sum of its proper divisors (231912384).

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

70371840 is a wasteful number, since it uses less digits than its factorization.

70371840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 70371840 is about 8388.7925233612. The cubic root of 70371840 is about 412.8569839008.

The spelling of 70371840 in words is "seventy million, three hundred seventy-one thousand, eight hundred forty".