70819840 has 224 divisors, whose sum is σ = 220187520. Its totient is φ = 21233664.

The previous prime is 70819831. The next prime is 70819867. The reversal of 70819840 is 4891807.

It is a tau number, because it is divible by the number of its divisors (224).

It is a self number, because there is not a number n which added to its sum of digits gives 70819840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3727351 + ... + 3727369.

It is an arithmetic number, because the mean of its divisors is an integer number (982980).

Almost surely, 2^70819840 is an apocalyptic number.

70819840 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 70819840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110093760).

70819840 is an abundant number, since it is smaller than the sum of its proper divisors (149367680).

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

70819840 is a wasteful number, since it uses less digits than its factorization.

70819840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 70819840 is about 8415.4524536712. The cubic root of 70819840 is about 413.7312389761.

The spelling of 70819840 in words is "seventy million, eight hundred nineteen thousand, eight hundred forty".