70449890 has 32 divisors (see below), whose sum is σ = 148466304. Its totient is φ = 23564160.

The previous prime is 70449881. The next prime is 70449893. The reversal of 70449890 is 9894407.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (70449893) 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, 9404 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (4639572).

Almost surely, 2^70449890 is an apocalyptic number.

70449890 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

70449890 is an abundant number, since it is smaller than the sum of its proper divisors (78016414).

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

70449890 is a wasteful number, since it uses less digits than its factorization.

70449890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24602.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 70449890 is about 8393.4432743660. The cubic root of 70449890 is about 413.0095618913.

The spelling of 70449890 in words is "seventy million, four hundred forty-nine thousand, eight hundred ninety".